Pulley.



L. A. BIGGAR.

PULLEY.

APPLICATION FILED 1150.13, 1913.

Patented Dec. 8, 1914.

2 SHEETS-SHEET 1.

Witumvmo THE NORRIS PETERS coy. PHOYOVLIIHO. WASHINL an. 0. c.

L. A. BIGGAR.

PULLBY.

APPLICATION FILED DEO.13,1913. 1,120,590. Patented De0.8,1914.

2 SHEETSSHEET 2.

Fig.3.

31 n uem to'c LergZLBj ar (M wnbumnm n 4 n1! noRms PETERS CO.,PHD10-L1THLEROY A. BIGGAR, OF ONEIDA, NEW YORK.

PULLEY.

Specification of Letters Patent.

Patented Dec. 8, 1914:-

Application filed December 13, 1913. Serial No. 806,576.

To all whom it may concern Be it known that I, LEROY A. BIGGAR, acitizen of the United States, residing at Oneida, in the county ofMadison and State of New York, have invented new and useful Improvementsin Pulleys, of which the following is a specification.

This invention relates to split pulleys and in particular to a hub forsheet metal pulleys of this type, whose sections are constructed ofmalleable iron and are preferably cast.

The primary object of the invention is to provide a split pulley of thischaracter wherein the sheet metal spokes are composed of separablelongitudinal sections and,

are adapted to be secured in a rigid manner to the rim and hub sectionsthe spokes being so disposed that two of the arms are arranged at thejoint between the rim and hub sections with one half of each spokeconnected with one section and the other half connected with the othersection whereby a most effective and durable connection between sectionsis afforded.

A furtherobject is to provide a split pulley wherein each hub section isformed of one piece of metal and is-provided with pockets for thereception of the inner ends of the spokes and with reinforcing ribs andabutments which are disposed in such a manner 'as to resist axial andcentrifugal or centripetal strain.

The invention consists in the features of construction, combination, andarrangement of parts, hereinafter fully described and claimed, referencebeing had to the. accompanying drawings, in which:

Figure 1 is a side elevation of a pulley constructed in accordance withthe invention, a portion of the same being broken away; Fig. 2 is atransverse sectional view taken through the same; Fig. 3 is alongitudinal sectional view therethrough; Fig. 4: is a detail plan viewof one of the hub sections, showing one 'se'ctionof a spoke connectedtherewith, the said spoke sectionbeing broken away; Fig. 5 is a bottomplan view of thesame; and, Fig. 6 is a vertical sectional view on line66 of Fig. 4;.

In the drawings the numerals 1 and 2 designate the companion sections ofthe pulley hub. Each section is semi-cylindrical in general formationand is provided at each of its ends with a pair of longitudinallyspaced, tangentially disposed bosses 3.

Each boss is provided with a longitudinal bolt opening 4 and therespective boss openings of one hub section are adapted to register withthe boss openings of thecompanion section, when both sections areunited, in order that the clamping bolt members 5 may be mounted thereinfor the purpose of clamping the hub sections upon a. shaft (not shownEach hub section is provided medially with a semi-annular, outwardlybulging portion 6, whose outer periphery is irregular in shape wherebythe alternate abutments 7 andpockets S are provided. In this instance,the pulley is a six spoke pulley so each hub section has a medial pocketformed in the outer periphery of its bulged portion 6 andtwo terminalpockets, each of the latter being disposed adjacent to one end of thehub section. The bulging portion 6 is provided medially with anoutstruck rib 9 which passes through the respective pockets 8, each endwall 10 of each pocket, which is formed by the adjacent abutment 7,being provided centrally with a projection 11 which extends into thepocket and merges into the rib 9. A semicylindrical sleeve 12 is mountedwithin each hub section in engagement with the inner periphery of itsend portions, and is connected with the said hub section by means of theattaching members 13, which are preferably rivets and are engaged withinthe end portions of the hub section.

Each spoke which is to be used with the hub construction just describedcomprises two coextensive sections 14, each of which is compressed fromsheet metal and is formed with an angularly bent foot 15 upon its innerend. The spoke section is further provided with an outstruck, medial rib16 which extends longitudinally and is continued in the foot 15, inorder that. when the foot is positioned within one of the hub sectionpockets. approximately half of that portion of the hub rib 9 whichextends through the pocket will be received within the concave face ofthe foot extension of the spoke rib 16. and the projection 11 will beengaged within the adjacent portion of outwardly as at 18 is placedwithin the said pocket in engagement with the adjacent feet of the saidspoke sections with its bowed portion receiving the ribs of the feet.Each end of the clip is broadened so as to fit snugly within the sideportion of the pocket and is provided with apertured dished portions 19for registration with the correspondingly dished, apertured portions 20of the spoke section feet which are likewise in alinement with radial,openings 21 which are provided in the bulging portion 6 of the hubsection in communication with the pocket. Attaching members 22.. such asrivets or the like, are engaged within these registering openings andserve to bind the feet ofthe spoke sections securely within thereceiving pocket. It should be apparent from the foregoing descriptionthat the companion sections of each spoke will have their feet mountedwithin the adjacent portions of adjacent pockets and will thus beinclined outwardly toward each other. Lateral flanges 25 are formed uponthe outer ends of the spoke sections for engagement with the innerperiphery of the corresponding, semi-annular rim section 26. Theseflanges are se cured to the rim section by means of attaching members27. I

It will be noted that the two oppositely extending spokes which aredisposed at the joint between the pulley sections, are each formed bycompanion sections in the abovedescribed manner, one of which is securedfixedly to the hub and rim sections of onehalf the pulley, whereas theother spoke section is embodied permanently in the construction ofthe-other half of the pulley. The outer ends of these connecting spokesections are bolted together by means of a bolt member 24 which ismounted in the apertured dished portions thereof, thereby strengtheningthe connection between the separable parts of the pulley as a whole.

vThe meeting edges of the rim sections are also connected by means ofthe connecting plates 28, whose ends are secured by means of the boltmembers 29 to the rim ends. There; are two ofthese connecting plates ateach joint, and they are disposed on opposite sides of the outer ends ofthe corresponding, connecting spoke sections.

From the foregoing description taken in connection with the accompanyingdrawings, it will be. seen that I have provided a simply constructedsplit pulley, which is composed. of few parts, all of which may beseparated for repair, replacement, or

shipping purposes, and ,may be readily and conveniently reassembled, Thesplit sections or halves of the pulley may also be disconnected readilyin order to detach the pulley from a shaft, and may be bound togetherwhen applied to a shaft in a secure and positive manner. In suchoperations affecting the pulley halves or sections as units, therelative positions of the parts of 1 either unit will not be disturbed.It is to be understood, however, that minor changes in the details ofconstruction, such as fall within the scope of the; appended claims maybe resorted to in practice if found necessary.

What I claim is :v

1. In a split pulley, a semi-cylindrical hub section having an outwardlybulging annular portion formed medially thereon, the outer periphery ofthe said bulged portion being provided with alternate enlargements andpockets, a rim section, a plurality of spokes adapted to connect the huband rim sections, each of said spokes in cluding coextensivelongitudinal sections adapted to have their inner ends engaged withinadjacent hub pockets and againstthe intervening enlargement, each spokesection having a lateral foot upon the inner end thereof for engagementwith the inner face of the receiving pocket, a hub clip adapted to bemounted completely within each hub pocket in engagement with the outerfaces of the section feet of adjacent spokes disposed therein, and meansfor securing the said clips tothe hub section.

2. In a split pulley, a semi-cylindrical hub sectlon having an outwardlybulging annular portion formed medially thereon,

the outer periphery of the said bulged porfor engagement with the innerface of the receiving pocket, a hub clip adapted to be mounted withineach hub pocket in engagement with the outer faces of the section feetof adjacent spokes disposed therein, and

means for securing the said clips to the' hub section, each spokesection-being con structed of flat material and being outstruck mediallyto provide a longitudinal rib extending throughout the length of itsfoot, the said hub section having an annular rib formed medially uponthe outer periphery of the bulging p'ortion of the same extendingthrough its pockets for reception within the concave inner faces of theribs of the spoke section feet. p I

" 3. In a split pulley, a semi-cylindrical hub section having anoutwardly bulging annular portion formed medially thereon, the outerperiphery of the said bulged .portion being provided with alternateenlargements and pockets, a rim section, a plurality of spokes adaptedto connect the hub and rim sections, each of said spokes includingcoextensive longitudinal sections adapted to have their inner endsengaged within adjacent hub pockets and against the interveningenlargement, each spoke section having a lateral foot upon the inner endthereof for engagement with the inner face of the receiving pocket, ahub cli adapted to be mounted Within each hu pocket in engagement withthe outer faces of the section feet of adjacent spokes disposed therein,and means for securing the said clips to the hub section, each spokesection being constructed of flat material and being outstruck mediallyto provide a longitudinal rib extending throughout the length of itsfoot, the said hub section hav ing an annular rib formed medially uponthe outer periphery of the bulging portion of the same extending throughits pockets for reception within the concave inner faces of the ribs ofthe spoke section feet, each hub clip having its medial portion bowedoutwardly for engagement with the ribs of the feet of correspondingspoke sections.

4. In a split pulley, a semi-cylindrical hub section having an outwardlybulging annular portion formed medially thereon, the outer periphery ofthe said bulged portion being provided with alternate enlargements andpockets, a rim section, a plurality of spokes adapted to connect the huband rim sections, each of said spokes including coextensive longitudinalsections adapted to have their inner ends engaged within adjacent hubpockets and against the intervening enlargement, each spoke sectionhaving a lateral foot upon the inner end thereof for engagement with theinner face of the receiving pocket, a hub clip adapted to be mountedwithin each hub pocket in engagement with the outer faces of the sectionfeet of adjacent spokes disposed therein, and means for securing thesaid clips to the hub section, each spoke section being constructed offiat material and being outstruck medially to provide a longitudinal ribextending throughout the length of its foot, the said hub section havingan annular rib formed medially upon the outer periphery of the bulgingportion of the same extending through its pockets for reception Withinthe concave inner faces of the ribs of the spoke section feet, the hubsection also having a projection formed upon the end wall of itsenlargement extending into the adjacent pocket and merging into the hubrib for reception within the inner face of the rib of the correspondingspoke section.

In testimony whereof I aifix my signature in presence of two witnesses.

LEROY A. BIGGAR. Witnesses:

SIMON E. EGAN, CHRISTOPHER J. KELLY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

